The results are not very sensitive to macroscopic plastic anisotropy.
This stress is called the plastic instability stress (PIS).
This plastic instability was related to the propagation of Portevin-Le Chatelier (PLC) bands during deformation.
The failure criterion for defining the performance function is considered as plastic instability.
For λ<80 nm, the films are brittle at room temperature: they break without macroscopic plastic flow.
Thereby a link is created between the microstructural evolution and the macroscopic plastic behaviour.
In plastic yielding, the analyses are performed assuming an elastic perfectly plastic lattice, and a micromechanical model based on homogenization scheme is applied to a representative unit cell to determine the macroscopic plastic yield surfaces in stress space.
During loading the microstresses increase in the macroscopic elastic regime but start to decrease slightly with increasing load in the macroscopic plastic regime.
The failure of joints is caused by the plastic instability of the hub or the excessive plastic deformation of the closure plate.
For monotonic damage modes, the blanket structure shows a global satisfying behavior in immediate plastic collapse and plastic instability damage modes, and thermal creep damage mode.
